Sounds like you have a blockage in you grind passage. Try removing the brew group. Then inside on the roof of the machine where the brew unit was setting there is a drop chute where the coffee is dropped into the brew unit. From the left side of the drop chute pull down and back, and it will drop coffee. This will clear an opening that relieves pressure on the passage. There is a passage inside the drop chute area that goes to the grinder. Vacuum it out. It will be to the back side of the drop chute. Once that is cleared go to the bean hopper. There are 2 knobs in the bean hopper. Turn the large knob to the largest number. You can turn the knob to a larger number any time but it has to be grinding to turn to a smaller number. Now replace everything and make your coffee. Once you have made your coffee you can turn the knob back to a number that was higher than the one you had it on, but only when the grinder is running.

After a tons of browsing and debugging finally I got the real solution to my similar problem with a Saeco Minuto HD8763 coffee machine: the root cause was a bad hall sensor and a weak magnet at the grinder toothwheel (the left magnet whcih was removed from it's original place). The upper one was okay and down under there is the replacement magnet which I made from a piece of HDD neodymium magnet and glued to fix it.
The original hall sensor was marked as "210k 3491" ("HAL506K" based on some other service manuals) and the new one was a cheap non-smd but same size, unipolar "TLE4905" type.

HI
Are you leaving the machine on when you empty the dredge drawer? There has to be power for the computer to see that the dredge drawer has been removed. Leave it out at least 15 seconds, so the computer thinks you emptied it. This should clear the message.

First, I'm not a Saeco technician. Though I've worked on similar Saeco models.
*** The following is for information only. You should always call your vendor for service, as opening this machine will void warranty.***

- Water not getting to machine or not sensing that the water tank is already filled.
* There usually some type of float near to middle of the water tank. It's usually white or colored plastic. This 'float' needs to move freely up-down to 'sense' the filled tank. clean the tank and shake it -note the movement of this float. It will need further cleaning if it's stuck (or you will have to replace tank if it's crudded up).
* Re-install tank and fill with filtered water. Turn machine off, count to 15 then turn on again. This usually turns on pump to add water to inner tank. If this does not happen then there is a CPU problem. If it does hums for 5-10 seconds then goes off but no heating then the pump may have an air bubble in line. Try the turn off and on method several times (up to 5) to get the water flowing. If it's still not working then there is a clog in the pump and will need service and/or replacement.
* Did you change water source? Since this is a table top machine in which you fill the water tank. Try to use filtered (bottled ok) water. Do Not use Distilled or 100% pure water as this type of water will eat out the metals from your machine! Some places use a water softener as it tends to be better for the machine long term (years).
* Still got problems? Check with vendor or MFR for service or replacement. Most machines of this type do not have serviceable parts or adjustments.
Aloha, ukeboy57

the water tank has a float inside, the float has a magnet. the machine senses the position of the magnet and indicates water ok/not. sometimes the magnet rusts inside the plastic casing, renders it less magnetic so it wont work. or the float is missing- fell out while you were cleaning the tank. you will need a new magnetic float to fix the problem.

hi,
can you hear a quite louder noise when trying to make water flow?
If no or very faint noise can be heard, pump is probably faulty or needs to be disassembled and cleaned (see tutos on the Net)
If you can hear a loud noise, the pump is working but unable to suck water, keep on trying, if still unsuccessfull you will have to open the machine and fill yourself the watel inlet tube to "help" the pump priming.